Refresh & revive your Oster blender. Compatible with most Oster 5- and 6-cup glass or plastic jars. Oster 4961 Ice Blade dimensions: 2 3/16 inches (height) x 2 9/16 inches (diameter). Oster O-Ring Gasket dimensions: 1/16 inches (height) x 2 9/16 inches (diameter).